Class 6 Science Chapter 3: Mindful Eating: A Path to a Healthy Body

Mindful Eating: A Path to a Healthy Body is Chapter 3 of NCERT / CBSE Class 6 Science. This page has the complete chapter notes across 5 topics , 100 practice MCQs with answers and explanations , 45 important short and long questions and 75 flashcards — all written to the NCERT / CBSE syllabus and free to read.

What We Eat, and Why It Differs

The traditional food of a state usually follows the crops grown there, along with taste, culture and tradition. Cooking practices have changed too, from the chulha and sil-batta to the gas stove and the electrical grinder.

What you will be able to do

  • I can explain why traditional food differs from one state to another.
  • I can link the food of a region to the crops grown there.
  • I can name the four things that shape what people in a region choose to eat.
  • I can describe two changes in cooking practice and give reasons for them.

Key points

  • A week of your own meals already shows variety, and your friends' lists will differ again.

  • What a state traditionally eats is built on the crops its own fields raise.

  • India has diverse soils and climates, so different regions grow different crops.

  • Food choice also follows taste preferences, culture and traditions, not crops alone.

  • Punjab grows maize, wheat, chickpea and pulses; Karnataka grows rice, ragi, urad and coconut.

  • Manipur grows rice, bamboo and soya bean, and eats eromba, utti, singju and kangsoi.

  • Culinary practices, which is the other name for cooking practices, have changed over time.

  • The chulha gave way to the gas stove and the sil-batta to the electrical grinder.

Full explanation

A Week of Your Own Meals

Keep a list for seven days of everything you eat. Most children expect the list to be boring and find it is not. Then compare it with a friend's list from the same week. Some items match and some do not, and the differences are the interesting part.

Now Widen the Question

If two children in one classroom eat differently, what happens across a whole country? India has twenty-eight states and eight union territories. The traditional food of each looks quite unlike the next. The question worth asking is not whether it differs, but why.

Start With What Grows

Look at three states side by side. Punjab grows maize, wheat, chickpea and pulses. Karnataka grows rice, ragi, urad and coconut. Manipur grows rice, bamboo and soya bean. Now look at what each eats, and the pattern is hard to miss.

The Food Follows the Crop

Punjab eats chhole bhature and parantha, halwa and kheer, and makki di roti with sarson da saag. Karnataka eats ragi mudde and rice, idli and dosa, rasam and sambhar, palya and coconut chutney. Manipur eats rice with eromba, utti, singju and kangsoi. Each list is built from the crops just above it.

Even the Drinks

The beverages follow too. Punjab drinks lassi and chhach, which is buttermilk, along with milk and tea. Karnataka drinks buttermilk, coffee and tea. Manipur drinks black tea. What grows nearby is what ends up in the glass as well as on the plate.

Why the Crops Differ

That pushes the question one step back. Why does Punjab grow maize and Karnataka ragi? India is an agricultural country with many soil types and many climates. Which crops a region can grow depends on its soil and its weather.

But Crops Are Not the Whole Answer

Three more things shape what a region eats. Taste preferences, which are simply what people there have come to like. Culture. And traditions, which carry a dish from one generation to the next long after the reason for it has been forgotten.

Some Foods Are Everywhere

Compare the state lists carefully and two kinds of item appear. Some turn up almost everywhere, rice being the clearest. Others belong to one place alone. Both kinds are worth noticing, because they answer different questions about a country.

Ask Somebody Older

There is a second question hiding here. Has the food itself stayed the same? Ask an elderly person in your family what they still eat and what is new to them, what has changed about cooking, and what they think caused it. Their answers are evidence you cannot get any other way.

From the Chulha to the Stove

Culinary practices, which is the other name for cooking practices, have changed a great deal. Most cooking was once done on a chulha, a traditional stove. Most of us now cook on a modern gas stove. The food may be the same dish, but the process is not.

From the Sil-batta to the Grinder

The second pair is grinding. Most grinding was once done by hand on a sil-batta, a stone grinder. These days an electrical grinder does the work in a fraction of the time. Anyone who has used both can tell you exactly what changed.

Why Anything Changed at All

Three reasons stand behind those changes. Technological development, which put new tools within reach. Improved transportation, which brought foods from further away. And better communication, which carried ideas about cooking from one place to another.

What Else Went With the Chulha

Think about what a change of tool actually changes. A chulha burns wood or dung and needs somebody to tend it. A gas stove lights at a turn and goes out at a turn. That is a difference in time, in smoke, in who does the work, and in what the kitchen smells like.

The Saying on the Noticeboard

The chapter opens with an old line: annena jatani jivanti, which means food is what gives life to every living being. Another says the healthy person is the one whose food is wholesome, moderate in quantity, and suited to the season, the time and the place. Both are worth holding on to.

What This Chapter Is Really About

So variety in food is not random. It is the record of a place: its soil, its weather, its history and its tools. The next question is what all this food is actually made of, and why the body needs each part of it.

Concepts and terms

Traditional food

The dishes a region has eaten for generations. They usually rest on the crops that grow there, which is why the food of Punjab and of Manipur look so different from each other.

Culinary practices

The ways food is cooked and prepared, including the tools used. They differ between regions and they also change over time within one place.

Crops and climate

India has many soil types and climates. Which crops a region can grow depends on its soil and its weather, and that in turn shapes what is eaten there.

Beverage

A drink taken with or between meals. These follow the region too: lassi and chhach in Punjab, buttermilk and coffee in Karnataka, black tea in Manipur.

Watch out!

Myth or fact?

Case Study

Scenario:

A class lists what each child ate the day before. Rice appears on many lists and bajra roti on a few. Their teacher asks why the lists differ when everybody lives in one town. The children ask at home and bring back answers about where their families come from. Then they look at a crop map of India. Rice grows where rain is heavy, and bajra where it is light and the soil is dry. The two foods line up with two kinds of land. Meera says the lists are really a map. The class agrees that what a region eats grew out of what its own fields could raise.

Analysis:

A meal looks like a personal choice and is partly a record of the land. Rice and bajra differ because rainfall does.

Activity:

Ask three families which grain they eat most. Find out where each family comes from and whether the rainfall there is heavy or light.

Try it at home

Title:

The seven-day plate diary

Safety:

This is a writing task only. Do not skip a meal or change what you eat in order to make an interesting list.

What You Notice:

Your own list is more varied than you expected, which is the first surprise. The second is that the items that do not match usually come from somewhere: a grandmother's state, a festival, a crop grown near a family home. The differences have histories.

Did you know

The traditional food of a state usually follows the crops that state grows, which is why maize appears in Punjab and ragi in Karnataka.

Manipur grows bamboo as a food crop, and eromba, utti, singju and kangsoi are eaten there.

Technological development, better transport and better communication are the reasons the book gives for changed cooking practices.

Memory tricks

What decides the food of a region — CTCT - Crops, Taste, Culture, Tradition — Crops come first because they set what is available. The other three shape the choice.

Old tool and new tool — Chulha to stove, sil-batta to grinder — Two pairs, and both changes are about the same three reasons.

Practice MCQs with answers (20)

Q1 The traditional food of a state is usually based on: beginner
  • A the crops grown in that state
  • B the number of people living there
  • C the languages spoken there
  • D the distance from the sea
Show answer
Answer: the crops grown in that state
Why:

Look at what the fields grow and the menu follows.

Q2 Why does one region grow maize while another grows ragi? beginner
  • A Because farmers prefer different work
  • B Because their soils and climates differ
  • C Because one region is richer
  • D Because the crops cost different amounts
Show answer
Answer: Because their soils and climates differ
Why:

India is an agricultural country with diverse soils and climates.

Q3 Assertion: One region grows maize while another grows ragi. Reason: Their soils and their climates are different. advanced
  • A Both true, and the reason explains the assertion
  • B Both true, but the reason does not explain it
  • C The assertion is true and the reason is false
  • D The assertion is false and the reason is true
Show answer
Answer: Both true, and the reason explains the assertion
Why:

Both are true, and the reason is why the food of a place follows its fields. Taste and tradition then grow around what will grow.

Q4 Maize flour and mustard greens are the base of two dishes eaten together through the winter in one northern state. They belong to beginner
  • A Karnataka
  • B Manipur
  • C Punjab
  • D Kerala
Show answer
Answer: Punjab
Why:

Punjab grows the maize that makki di roti is made from.

Q5 Ragi mudde, idli and rasam appear on the same traditional menu in one southern state. They are dishes of beginner
  • A Punjab
  • B Karnataka
  • C Manipur
  • D Gujarat
Show answer
Answer: Karnataka
Why:

Karnataka grows rice, ragi, urad and coconut.

Q6 Eromba, utti, singju and kangsoi are everyday dishes in one north-eastern state. They are eaten in beginner
  • A Manipur
  • B Punjab
  • C Karnataka
  • D Rajasthan
Show answer
Answer: Manipur
Why:

Manipur grows rice, bamboo and soya bean.

Q7 Which of these crops is grown in Manipur and is not usually thought of as food? beginner
  • A Chickpea
  • B Coconut
  • C Bamboo
  • D Wheat
Show answer
Answer: Bamboo
Why:

Rice, bamboo and soya bean are the three listed for Manipur.

Q8 Lassi and chhach are drunk in Punjab. Chhach is: beginner
  • A coffee
  • B black tea
  • C sugarcane juice
  • D buttermilk
Show answer
Answer: buttermilk
Why:

Karnataka drinks buttermilk too, along with coffee and tea.

Q9 Cooking practices are also known as: beginner
  • A culinary practices
  • B cultural practices
  • C agricultural practices
  • D nutritional practices
Show answer
Answer: culinary practices
Why:

The word covers the tools as well as the method.

Q10 Before the gas stove, most cooking in India was done on a: beginner
  • A sil-batta
  • B chulha
  • C grinder
  • D griddle
Show answer
Answer: chulha
Why:

A chulha is a traditional stove burning wood or dung.

Q11 A sil-batta was used for: beginner
  • A storing grain through the year
  • B carrying water from a well
  • C grinding by hand
  • D cooling cooked food
Show answer
Answer: grinding by hand
Why:

The electrical grinder does the same job today.

Q12 Which set gives the three reasons for changed culinary practices? beginner
  • A Better schools, better roads, better hospitals and a great many shops
  • B Technological development, improved transport, better communication
  • C More people, more crops, more money
  • D New states, new languages, new festivals
Show answer
Answer: Technological development, improved transport, better communication
Why:

New tools, faster travel, and ideas moving between places.

Q13 Rehana lists her meals for a week and compares them with her friend's list. What will she most likely find? beginner
  • A The two lists are exactly the same
  • B Neither list has any food in common
  • C Some items match and some differ
  • D Only her own list contains rice
Show answer
Answer: Some items match and some differ
Why:

Variety appears even between two children in one classroom.

Q14 Some food items appear in many states and some in only one. What does the first kind show? beginner
  • A That those foods are by far the cheapest ones to grow anywhere
  • B That only those foods are healthy
  • C That those crops or dishes are widespread across India
  • D That the other foods are being forgotten
Show answer
Answer: That those crops or dishes are widespread across India
Why:

Rice is the clearest example of a food that turns up almost everywhere.

Q15 The Sanskrit line annena jatani jivanti means: beginner
  • A health is the ultimate wealth
  • B food is what gives life to every living being
  • C eat local, live long
  • D never waste any of the food that is on your plate
Show answer
Answer: food is what gives life to every living being
Why:

It was the thought of the day on the school noticeboard.

Q16 According to the wise saying at the start of the chapter, a healthy person eats food that is: beginner
  • A expensive, freshly bought and brought from far away
  • B cooked only at home
  • C grown within one kilometre
  • D wholesome, moderate, and right for the season
Show answer
Answer: wholesome, moderate, and right for the season
Why:

Three conditions together, not any one of them alone.

Q17 Why does the chapter ask you to interview elderly people? beginner
  • A Because they cook a great deal better than younger people do
  • B Because they eat a wider variety of food
  • C Because they know more about farming
  • D Because they can describe how food and cooking used to be
Show answer
Answer: Because they can describe how food and cooking used to be
Why:

Their memory is evidence that cannot be gathered any other way.

Q18 A family moves from Karnataka to Punjab. Which change would you expect first? beginner
  • A The crops in the local fields around them
  • B The language that is spoken by their neighbours
  • C The size of their house
  • D The season of the year
Show answer
Answer: The crops in the local fields around them
Why:

The fields change with the place, and the local menu follows them.

Q19 Consider these statements about traditional food. I. Makki di roti with sarson da saag belongs to Punjab. II. Ragi mudde, idli and rasam are traditional in Karnataka. III. Eromba, utti and singju are everyday dishes of Manipur. Which statements are correct? advanced
  • A I and II only
  • B II and III only
  • C I and III only
  • D I, II and III
Show answer
Answer: I, II and III
Why:

All three are correct. Each region cooks what its own fields grow, which is why the three menus have so little in common.

Q20 What does the variety of food across India mainly record? beginner
  • A How far each state is from the capital
  • B The wealth of each state in turn
  • C The number of festivals that each state holds each year
  • D The soil, weather, history and tools of each place
Show answer
Answer: The soil, weather, history and tools of each place
Why:

Variety in food is not random; it is the record of a place.

Important short questions (6)

Why is the traditional food of a state usually based on its own crops?

Because those crops are what grow there and are easily available. A region can only build its everyday dishes from what its soil and climate allow it to raise.

Name the four things that shape the choice of food in a region.

The crops cultivated in that region come first. Then the taste preferences of the people there, the culture, and the traditions.

Match one state to its crops and one of its dishes, for any two states.

Punjab grows maize and eats makki di roti. Karnataka grows ragi and eats ragi mudde. Either pair is enough.

What is meant by culinary practices, and give one way they have changed?

Culinary practices are the ways food is cooked and prepared, tools included. Grinding once done by hand on a sil-batta is now done on an electrical grinder.

Give the three reasons for changes in cooking practices over time.

Technological development, which brought new tools. Improved transportation. And better communication between places.

What questions would you ask an elderly person about food, and why?

What they still eat and what is new, what changed about cooking, and what caused it. Their memory is the only record of how food used to be in that house.

Long answer questions (3)

Think and write: a classmate says the food of a state is simply a matter of taste. Argue the case more fully.

Taste is one reason, but it is not the first one. What a region can eat every day is limited by what grows there. India has many soil types and climates, so different regions raise different crops. Punjab grows maize, wheat, chickpea and pulses, and its dishes are built from those. Karnataka grows rice, ragi, urad and coconut, and eats idli, ragi mudde and coconut chutney. Even the drinks follow. On top of the crops sit three more reasons: taste preferences, culture, and traditions handed down. So taste is real, but it works inside what the land already allows.

Think and write: describe how cooking has changed in Indian homes and explain why.

Two changes stand out. Cooking was mostly done on a chulha, a traditional stove, and is now mostly done on a gas stove. Grinding was mostly done by hand on a sil-batta, a stone grinder, and is now done on an electrical grinder. Three things drove this. Technological development put new tools within reach of ordinary homes. Improved transportation brought both tools and foods from further away. Better communication carried ideas about cooking from one place to another. The dish on the plate may be unchanged, but almost everything about making it is different.

Think and write: what does the variety of food across India tell you about the country?

It tells you the country is not one place but many. India is agricultural, with diverse soils and climates, so each region raises its own crops and builds its meals from them. Punjab, Karnataka and Manipur grow three quite different sets of crops and eat three quite different sets of dishes. Culture and tradition then carry those dishes forward through generations. At the same time some items, rice among them, turn up almost everywhere. So the food map shows both how different the regions are and what they share.

Flashcards (15)

What decides the traditional food of a state, more than anything else?
The crops grown in that state.
Why can one region grow crops that another cannot?
Because India has many soil types and climates, and crops need the right soil and weather.
Besides crops, name three things that shape what a region eats.
Taste preferences, culture and traditions.
Which crops does Punjab grow, and name two of its dishes.
Maize, wheat, chickpea and pulses. Makki di roti and sarson da saag are two dishes.
Which crops does Karnataka grow, and name two of its dishes.
Rice, ragi, urad and coconut. Idli and ragi mudde are two dishes.
Which crops does Manipur grow, and name two of its dishes.
Rice, bamboo and soya bean. Eromba and kangsoi are two dishes.
What is chhach, and where is it drunk?
Buttermilk, drunk in Punjab along with lassi, milk and tea.
Which beverage is listed for Manipur?
Black tea.
What is another name for cooking practices?
Culinary practices.
What was mostly used for cooking before the gas stove?
A chulha, which is a traditional stove.
What was used for grinding before the electrical grinder?
A sil-batta, which is a stone grinder worked by hand.
Give the three reasons the chapter offers for changed culinary practices.
Technological development, improved transportation, and better communication.
What does the Sanskrit line annena jatani jivanti mean?
Food is what gives life to every living being.
According to the wise saying, who is healthy?
The person whose food is wholesome, moderate in quantity, and right for the season, the time and the place.
How would you find out whether food habits have changed in your own family?
Interview elderly people about what they ate, how they cooked, and what they think changed it.

Play this topic

  • Which state?
  • Crop and dish
  • Fact or myth?
  • From the land to the plate
  • Food map sprint

Energy and Building: Carbohydrates, Fats, Proteins

Carbohydrates and fats give the body energy, which is why they are called energy-giving foods. Proteins help the body grow and repair itself, which makes them body-building foods.

What you will be able to do

  • I can name the two energy-giving food components and give sources of each.
  • I can explain why a runner is given glucose water during a race.
  • I can say what proteins do and name plant and animal sources of them.
  • I can explain why carbohydrates and fats are grouped apart from proteins.

Key points

  • Glucose gives instant energy, and glucose is a kind of carbohydrate.

  • Carbohydrates are among the main sources of energy in the diet, and common sugar is one.

  • Cereals like wheat, rice and maize, potato and sweet potato, and banana, pineapple and mango carry carbohydrates.

  • Ghee and oils are fats. Groundnuts, walnuts, coconuts, almonds, pumpkin seeds and sunflower seeds are sources.

  • Fat is a store of energy, and a polar bear lives on the fat under its skin through a long winter sleep.

  • Carbohydrates and fats together are called energy-giving foods.

  • Plant sources of protein include pulses, beans, peas and nuts; animal sources include milk, paneer, egg, fish and meat.

  • Protein helps growth and repair, so protein-rich foods are called body-building foods.

Full explanation

Skip a Meal and Notice

Everyone has missed a meal at some point. What happens is not subtle. You feel tired and much less energetic, and it comes on within hours. That feeling is the plainest evidence there is that food is doing something inside you, and not just filling a space.

The Runner and the Glucose

Watch a marathon and you will see runners drinking glucose water during the race and again after it. Why glucose and not something else? Because glucose gives energy at once, and at that moment there is no time to wait.

Glucose Belongs to a Family

Glucose is not a thing on its own. It is an example of a carbohydrate, and carbohydrates are among the primary sources of energy in what we eat. Once you know that, a long list of ordinary foods falls into place.

Where the Carbohydrates Are

Cereals carry them: wheat, rice, maize, bajra. So do vegetables such as potato and sweet potato. So do fruits such as banana, pineapple and mango. And so does the common sugar in the kitchen, which is itself a kind of carbohydrate.

Why Laddoos in Winter

Ask why laddoos appear in winter and a grandmother is likely to say they give energy and keep you warm. Look at what goes into one. Besan or wheat flour, which is aata, along with ghee, goond, nuts and seeds. The ghee is the part that matters here.

Ghee and Oils Are Fats

Ghee and the various cooking oils belong to a second food component, called fat. Its sources can be plants or animals. Among the nuts are walnuts and almonds, groundnuts and coconuts and almonds carry it. So do seeds such as pumpkin seeds and sunflower seeds.

Fat Is Energy Kept Back

Carbohydrate is energy you can spend now. Fat is a source of stored energy, held for later. That difference matters more than it sounds, and the clearest illustration of it is an animal that has to live for months without a single meal.

The Polar Bear's Winter

A polar bear builds up a great deal of fat under its skin. That fat is its energy source through a winter sleep, called hibernation, that lasts months. It survives the whole of it without eating. The store is the only thing keeping it alive.

One Name for Both

Carbohydrates and fats both give us energy for doing things, so the two of them share a name: energy-giving foods. Try listing more foods rich in each. Most kitchens turn out to be full of them.

A Different Kind of Job

Not every food component is about energy. Proteins are an important part of what we eat, and they do something else entirely. Pulses carry them, and so do the milk products, which is why both turn up in almost every Indian meal.

From Plants and From Animals

Protein comes from both. Excellent plant sources are pulses, beans, peas and nuts, which on a plate means gram, moong, tuar dal, kidney beans, peas and soya bean. Animal sources are milk, paneer, egg, fish and meat.

Growth and Repair

What protein does is help the body grow and repair itself. That is why protein-rich foods are called body-building foods, and why sportspersons need protein in larger quantities to build their muscles.

Why It Matters for You

Growing children need the right amount of protein for proper growth and development. Not none, and not endless quantities either. The right amount, which is a phrase that comes back later in this chapter and matters more each time.

An Unexpected Source

Mushrooms deserve a mention here. Most kinds come up in places that are dark and damp, and the edible ones carry good protein. Not every protein food is a pulse or a piece of meat.

What Is Still Missing

So three components are accounted for. Carbohydrates and fats for energy, proteins for building. But none of those explains why sailors on long voyages once fell ill, and why a slice of lemon cured them. That is the next topic.

Concepts and terms

Carbohydrate

A food component that is one of the main sources of energy in the diet. Glucose is one, and so is the common sugar in a kitchen. Cereals, potatoes and many fruits carry it.

Fat

A food component that acts as a store of energy. Ghee and cooking oils are fats, and so are the oils inside nuts and seeds. Sources may be plants or animals.

Protein

A food component that helps the body grow and repair itself. Pulses, beans, peas and nuts carry it, and so do milk, paneer, egg, fish and meat.

Energy-giving and body-building foods

Two groups named by their job. Carbohydrates and fats give energy for activity. Proteins build and mend the body, which is why growing children need the right amount.

Watch out!

Myth or fact?

Case Study

Scenario:

Two pupils plan a day's meals for a school trip. Ravi wants only sweets and biscuits, arguing that sugar gives instant energy. Sana agrees about the energy and asks what else the day needs. Their teacher gives them a simple table of what a plate should carry. The class works out that energy foods are only one row of several. Walking all day uses energy, so carbohydrates matter, but the children are also still growing, and growth needs protein. Ravi changes his plan. He keeps something sweet for the climb and adds dal and curd for the rest. The class sees that a diet answers more than one question at a time.

Analysis:

Ravi was right that glucose is quick energy and wrong that a day needs only energy. Growth and repair need protein whatever the walking demands.

Activity:

Write a day of meals for a long walk. Mark which item supplies energy and which supplies growth, and check that both appear.

Try it at home

Title:

Sort your own kitchen shelf

Safety:

Ask before you open a shelf or a jar. Do not taste anything, do not climb, and stay away from the stove and from anything hot or sharp.

What You Notice:

The carbohydrate column fills fastest in most Indian kitchens, because cereals are the base of the meal. The starred items are the interesting ones. Peanuts belong in two columns, and so does milk, and that is a real finding rather than a mistake.

Did you know

A polar bear builds up fat under its skin and lives on it through a winter sleep that lasts months, without eating.

Edible mushrooms, which come up in dark and damp places, carry good protein.

The common sugar in your kitchen is a kind of carbohydrate, just as glucose is.

Memory tricks

What each component does — Carbs run, fats store, protein builds — Three jobs in three words. Energy now, energy later, and the building work.

Where protein comes from — Pulses and paneer — One plant word and one animal word, to remind you the sources come from both.

Practice MCQs with answers (20)

Q1 A runner is handed glucose water during a race because glucose: beginner
  • A builds muscle quickly
  • B provides energy at once
  • C keeps the body cool
  • D replaces lost protein
Show answer
Answer: provides energy at once
Why:

There is no time to wait for a slower supply.

Q2 A runner is handed glucose water during a race and feels the lift almost at once. Glucose is an example of a beginner
  • A protein
  • B carbohydrate
  • C mineral
  • D vitamin
Show answer
Answer: carbohydrate
Why:

Common kitchen sugar is another kind of carbohydrate.

Q3 Which set lists only sources of carbohydrate? beginner
  • A Wheat, rice, potato, banana
  • B Paneer, egg, fish, meat
  • C Walnut, almond, ghee, oil
  • D Amla, guava, lemon, orange
Show answer
Answer: Wheat, rice, potato, banana
Why:

Cereals, some vegetables and many fruits carry carbohydrate.

Q4 The sugar in a kitchen jar sweetens tea and goes into every sweet in the house. Common sugar is beginner
  • A a protein
  • B a fat
  • C a type of carbohydrate
  • D not a food component at all
Show answer
Answer: a type of carbohydrate
Why:

The book asks this directly, right after introducing glucose.

Q5 Which ingredient of a winter laddoo is the fat? beginner
  • A Besan
  • B Wheat flour
  • C Goond
  • D Ghee
Show answer
Answer: Ghee
Why:

Ghee and the various oils are grouped under fat.

Q6 Sources of fat: beginner
  • A come only from animals
  • B come only from plants
  • C can come from plants or animals
  • D come only from cooked food
Show answer
Answer: can come from plants or animals
Why:

Nuts and seeds on one side, butter and curd on the other.

Q7 Four foods are listed and three of them are sources of fat. Which one is NOT? beginner
  • A Groundnut
  • B Sunflower seeds
  • C Walnut
  • D Tuar dal
Show answer
Answer: Tuar dal
Why:

Tuar dal belongs with the plant sources of protein.

Q8 The special role of fat in the body is to act as: beginner
  • A a store of energy
  • B a builder of muscle
  • C a protector against disease
  • D a carrier of water
Show answer
Answer: a store of energy
Why:

Carbohydrate is energy now; fat is energy held back.

Q9 A polar bear survives a months-long winter sleep because it has: beginner
  • A eaten a very large last meal
  • B a thick coat of fur only
  • C fat accumulated under its skin
  • D stored food in a den
Show answer
Answer: fat accumulated under its skin
Why:

That fat serves as its energy source through hibernation.

Q10 Assertion: A polar bear can sleep through a whole winter without eating. Reason: Fat acts as a store of energy in the body. advanced
  • A Both true, and the reason explains the assertion
  • B Both true, but the reason does not explain it
  • C The assertion is true and the reason is false
  • D The assertion is false and the reason is true
Show answer
Answer: Both true, and the reason explains the assertion
Why:

Both are true, and the reason is what makes the long sleep possible. The store was laid down before the winter began.

Q11 Consider these statements about food components. I. Fat comes only from animals. II. Glucose is a carbohydrate. III. Carbohydrates and fats together are called energy-giving foods. Which statements are correct? advanced
  • A I and II only
  • B II and III only
  • C I and III only
  • D I, II and III
Show answer
Answer: II and III only
Why:

II and III are correct. I is not: groundnut, sunflower seeds and walnut are all plant sources of fat.

Q12 Protein is needed mainly for: beginner
  • A instant energy during exercise
  • B growth and repair of the body
  • C keeping the body warm at night
  • D storing energy for later
Show answer
Answer: growth and repair of the body
Why:

This is why protein-rich foods are called body-building foods.

Q13 Which set lists only plant sources of protein? beginner
  • A Gram, moong, tuar dal, kidney beans
  • B Milk, paneer, egg, fish
  • C Potato, banana, mango, sugarcane
  • D Ghee, butter, oil, curd
Show answer
Answer: Gram, moong, tuar dal, kidney beans
Why:

Peas, nuts and soya bean belong in the same group.

Q14 Which set lists only animal sources of protein? beginner
  • A Peas, beans, nuts, soya bean
  • B Wheat, rice, maize, bajra
  • C Milk, paneer, egg, fish
  • D Carrot, papaya, mango, amla
Show answer
Answer: Milk, paneer, egg, fish
Why:

Meat is the fifth one the book names.

Q15 Why do sportspersons need protein in larger quantities? beginner
  • A To run for longer without tiring
  • B To build their muscles
  • C To keep their body temperature up
  • D To replace the water they lose
Show answer
Answer: To build their muscles
Why:

Building is exactly what protein does.

Q16 A growing child needs: beginner
  • A no protein at all until adulthood
  • B as much protein as possible
  • C protein only from animal sources
  • D the right amount of protein
Show answer
Answer: the right amount of protein
Why:

Not none, and not endless quantities. The right amount.

Q17 Edible mushrooms are a good source of: beginner
  • A protein
  • B fat
  • C sugar
  • D water
Show answer
Answer: protein
Why:

They come up in places that are dark and damp.

Q18 Ali eats a plate of rice with a spoon of ghee and a bowl of dal. Which components has he taken? beginner
  • A Only carbohydrate
  • B Carbohydrate and fat only
  • C Carbohydrate, fat and protein
  • D Fat and protein only
Show answer
Answer: Carbohydrate, fat and protein
Why:

Rice for carbohydrate, ghee for fat, dal for protein.

Q19 What is the real difference between carbohydrate and fat? beginner
  • A One comes from plants and one from animals
  • B One is a nutrient and the other is not
  • C One is needed daily and the other only in winter
  • D One is energy now and the other is energy stored
Show answer
Answer: One is energy now and the other is energy stored
Why:

The polar bear is the clearest demonstration of the storing half.

Q20 Meera says every food component in this topic is about supplying energy. What is wrong with that? beginner
  • A Nothing, since all food gives energy
  • B Fats do not supply energy at all
  • C Carbohydrates are needed only by sportspersons
  • D Protein is for growth and repair, not energy supply
Show answer
Answer: Protein is for growth and repair, not energy supply
Why:

Two components give energy; the third does the building.

Important short questions (6)

Why is glucose given to a marathon runner rather than a plate of food?

Because glucose provides energy at once. A meal would take time the runner does not have during a race.

Name three sources of carbohydrate from three different kinds of food.

Wheat from the cereals, potato from the vegetables, and banana from the fruits. Common sugar would also count.

What is the difference in role between a carbohydrate and a fat?

Carbohydrate supplies energy that can be used at once. Fat is a store of energy, kept for later use.

Explain how a polar bear lives through months of winter sleep.

It accumulates a great deal of fat under its skin before the sleep. That fat is its energy source, so it survives the whole hibernation without eating.

Why are protein-rich foods called body-building foods?

Because protein helps the body grow and repair itself. That building work is what the name refers to.

Give two plant and two animal sources of protein.

Pulses and peas from plants, and also beans and nuts. Milk and egg from animals, and also paneer, fish and meat.

Long answer questions (3)

Think and write: a friend says all food is really the same, since it all just gives you energy. Set out why this is wrong.

Two of the components in this topic do supply energy, but the third does not. Carbohydrates are among the primary sources of energy, and glucose is the quickest of them. Fats also carry energy, but as a store held for later. Together those two are called energy-giving foods. Proteins do something else. They help the body grow and repair itself, which is why they are called body-building foods, and why sportspersons need more of them to build muscle. A child who ate only energy foods would still not grow properly.

Think and write: describe where the body gets each of the three components discussed here, with examples.

Carbohydrate comes from cereals such as wheat, rice and maize, from vegetables such as potato and sweet potato, and from fruits such as banana, pineapple and mango. Common sugar is one too. Fat comes from ghee and cooking oils, and from nuts such as groundnut, walnut, coconut and almond, and from seeds such as pumpkin and sunflower. Its sources may be plants or animals. Protein comes from pulses, beans, peas and nuts on the plant side, and from milk, paneer, egg, fish and meat on the animal side. Edible mushrooms are a good source as well.

Think and write: explain what the polar bear shows about fat, and why an ordinary meal cannot do the same job.

A polar bear builds up fat under its skin during the months when food is available. It then sleeps through a winter that lasts months, eating nothing at all, and the stored fat keeps it alive. That is what makes fat different from carbohydrate. Carbohydrate is energy the body can spend straight away, like the glucose a runner drinks mid-race. It is not designed to sit in the body for months. Fat is, and an animal with no way to find food through a whole winter needs exactly that kind of store.

Flashcards (15)

What happens to you within hours of skipping a meal, and what does that show?
Tired, with much less energy. It shows food is supplying the body with something it needs.
Why is a marathon runner given glucose water?
Because glucose provides instant energy, and during a race there is no time to wait.
What kind of food component is glucose?
A carbohydrate.
What is the main job of carbohydrates in the diet?
They are among the primary sources of energy.
Name three cereals and two fruits that carry carbohydrates.
Wheat, rice and maize. Banana and mango, with pineapple as another.
Is common kitchen sugar a carbohydrate?
Yes. It is one type of carbohydrate, just as glucose is.
What goes into a winter laddoo?
Besan or wheat flour with ghee, along with goond, nuts and seeds.
Name four nuts and two seeds that are sources of fat.
Groundnuts, walnuts, coconuts and almonds. Pumpkin seeds and sunflower seeds.
What is the special role of fat, compared with carbohydrate?
Fat is a source of stored energy, held for later, while carbohydrate supplies energy now.
How does a polar bear survive months of winter sleep without eating?
It lives on the fat built up under its skin, which serves as its energy source.
Which two components are called energy-giving foods, and why?
Carbohydrates and fats, because both provide energy for performing various activities.
What do proteins do for the body?
They help the body grow and repair itself.
Why are protein-rich foods called body-building foods?
Because they support growth and repair, which is the building work of the body.
Give three plant sources and three animal sources of protein.
Pulses, beans and peas from plants. Milk, paneer and egg from animals.
Which food that comes up in dark, damp places carries good protein?
The edible mushroom.

Play this topic

  • Which component?
  • Component and job
  • Fact or myth?
  • Reading a plate
  • Components sprint

The Protective Nutrients: Vitamins and Minerals

Vitamins and minerals are needed only in small amounts, but without them the body falls ill. Two investigations, one at sea in 1746 and one in India in the 1960s, are how the connection was found.

What you will be able to do

  • I can retell how scurvy and goitre were traced to missing food components.
  • I can name the vitamins and minerals in the chapter with a source and a deficiency for each.
  • I can define a nutrient and list the five major nutrients.
  • I can explain why vitamins and minerals are called protective nutrients.

Key points

  • During a 1746 voyage, James Lind saw that sailors who ate lemons and oranges recovered from bleeding and swollen gums.

  • Bleeding and swollen gums are symptoms of scurvy, caused by a lack of Vitamin C.

  • In the 1960s, swellings low in the throat were widespread across the Himalayan region and the Northern plains.

  • Such a swelling is goitre, which follows a lack of iodine. Iodised salt visibly reduced it.

  • Iodised salt is everyday salt with iodine salts blended into it, in the quantity needed.

  • Vitamins A, B1, C and D and the minerals calcium, iodine and iron protect the body from disease.

  • Nutrients give energy, support growth, help repair, protect against disease and keep the body working.

  • Vitamins and minerals are called protective nutrients, needed in small amounts but essential.

Full explanation

Two Puzzles, Two Centuries Apart

Carbohydrates, fats and proteins do not explain everything. Two stories show why. One happened at sea in the seventeen hundreds, and one in India in the nineteen sixties. Both begin with a group of people falling ill for no reason anyone could see.

Case One: The Sailors

Sailors on the long voyages of earlier times often developed gums that bled and swelled. On one such voyage, in 1746, a Scottish physician named James Lind noticed something. Those who ate lemons and oranges recovered. The others did not.

What Lind Had Found

Gums that bleed and swell are the marks of a disease called scurvy. Lemons and oranges are citrus fruits and they carry Vitamin C, and scurvy follows a shortage of it. The cure was not a medicine at all. It was a missing part of the food.

Case Two: The Swollen Necks

In the 1960s, Indian scientists found something among people of the Himalayan region and of the Northern plains: swellings low in the throat were widespread. This time the answer lay not in the food itself but in the ground the food grew in.

Iodine, Missing From the Soil

The soil of that region was short of iodine, so the local food and water were short of it too. A swelling low in the throat is the sign of goitre, and goitre follows a lack of iodine. Nobody there was eating badly. The place itself was short of something.

What Was Done About It

The Government of India set norms, and iodine began to be added to common salt. Iodised salt is nothing exotic: ordinary salt with iodine salts blended in, in the quantity needed. Where people used it, the swelling visibly reduced.

The People Who Farm Salt

Salt itself has a story. The Agariyas are a tribal community of salt farmers. They work the Little Rann of Kutch, and elsewhere in Gujarat too. Eight months of every year they spend out in fierce desert heat, and winning salt from seawater is hard labour.

The Pattern in Both Cases

Look at the two cases together and the shape is the same. A group of people, a set of symptoms, and one food component missing. Put the component back and the symptoms go. That pattern gave a name to a whole class of illness.

Vitamin A and Vitamin B1

Vitamin A keeps eyes and skin healthy, and comes from papaya, carrot, mango and milk. Without it comes loss of vision, starting with poor sight in darkness. Vitamin B1 keeps the heart healthy and supports many bodily functions, and comes from legumes, nuts, whole grains, seeds and milk products. Its lack causes beriberi.

Vitamin C and Vitamin D

Vitamin C helps the body fight diseases and comes from amla, guava, green chilli, orange and lemon. Without it comes scurvy: bleeding gums and slow healing of wounds. Vitamin D helps the body absorb calcium for bones and teeth, and comes from sunlight, milk, butter, fish and eggs. Its lack causes rickets, which means soft and bent bones.

The Three Minerals

Calcium keeps bones and teeth healthy and comes from milk, soya milk, curd, cheese and paneer; without it come weak bones and tooth decay. Iodine supports physical and mental activity and comes from seaweed, singhada and iodised salt; without it comes goitre. Iron is an important part of blood and comes from green leafy vegetables, beetroot and pomegranate; without it comes anaemia.

The Word for All of Them

A food component earns the name nutrient when it gives energy, supports growth, helps repair, guards the body against disease and keeps its functions running. The major ones in food are carbohydrates, proteins, fats, vitamins and minerals. Five in all.

Why Protective

Vitamins and minerals carry a second name too, the protective nutrients, because that is the job they do: guarding the body against disease and keeping it healthy. They are needed only in small amounts. Small is not the same as optional.

What Cooking Takes Away

Notice what happens to vegetables when they are cooked. They lose their bright colour and turn softer and less crisp. Some nutrients, Vitamin C among them, are lost to the high heat. That is a good argument for including fruits and uncooked vegetables in a diet.

And a Warning About Washing

Washing cut or peeled vegetables and fruits also loses some vitamins into the water. That is not a reason to skip washing. All fruits and vegetables should be washed thoroughly before they are eaten. Wash them whole, before cutting, and you lose less.

Concepts and terms

Nutrient

A food component that provides energy, supports growth, helps repair, protects the body from disease and keeps its functions running. The five major ones are carbohydrates, proteins, fats, vitamins and minerals.

Protective nutrients

Vitamins and minerals together. They guard the body against disease and keep it healthy. Only small amounts are needed, but those amounts are not optional.

Deficiency disease

An illness caused by a food component being missing or too scarce in the diet. Scurvy, beriberi, rickets, goitre and anaemia are the examples in this chapter.

Iodised salt

Everyday kitchen salt with iodine salts blended in, in the quantity needed. It was introduced to answer the iodine shortage in the soil of some Indian regions.

Watch out!

Myth or fact?

Case Study

Scenario:

A class reads that sailors on a 1746 voyage recovered when they were given lemons and oranges. Imran says the sailors must have been hungry. Nita points out that they had food and still fell ill, so hunger is not the explanation. Their teacher asks what lemons carry that ship's rations did not. The answer is Vitamin C, and the illness was scurvy. The class then looks at how long such a voyage lasted and what kept well at sea. Salted meat and dry biscuit last for months; fresh fruit does not. The children see that the illness followed from the storage problem rather than from any shortage of food.

Analysis:

Enough food and the right food are different things. The voyage had quantity and lacked one protective nutrient, and that is what the lemons supplied.

Activity:

Find out which foods in your kitchen keep for months and which spoil in days. Write one sentence on what a long journey would lose.

Try it at home

Title:

Read the label, find the mineral

Safety:

Handle packets only, not open containers. Do not taste anything, and put every packet back where you found it.

What You Notice:

Most salt packets say something about iodine, and most people have never read it. The amount is printed in very small type, which is itself worth noticing. The answer to the last question often reaches back to exactly the years the chapter describes.

Did you know

James Lind was a Scottish physician, and the voyage on which he made his observation was in 1746.

The Agariyas are a tribal community who win salt from seawater in the Little Rann of Kutch, and elsewhere in Gujarat.

For eight months a year the Agariyas work out in fierce desert heat to win that salt.

Memory tricks

The four vitamins in the chart — A eyes, B1 heart, C fights, D bones — One word each for what they look after. The deficiency diseases follow from it.

The three minerals — Calcium bones, Iodine neck, Iron blood — Bone and tooth decay, goitre, and anaemia are the three things that go wrong.

Practice MCQs with answers (20)

Q1 James Lind noticed something about the sailors on a long sea voyage and wrote it down carefully. That voyage was in beginner
  • A 1746
  • B 1846
  • C 1946
  • D 1960
Show answer
Answer: 1746
Why:

The 1960s belong to the second case, about iodine in India.

Q2 Those sailors had bleeding, swollen gums after months at sea with no fresh food. That is the mark of beginner
  • A goitre
  • B scurvy
  • C rickets
  • D anaemia
Show answer
Answer: scurvy
Why:

Lemons and oranges cured it, because they carry Vitamin C.

Q3 Fresh citrus fruit cured the sailors, which told Lind what their food had lacked. Scurvy is caused by a shortage of beginner
  • A iodine
  • B iron
  • C vitamin C
  • D calcium
Show answer
Answer: vitamin C
Why:

Amla, guava and green chilli are other sources of it.

Q4 A health worker sees a swelling low at the front of a patient throat and asks about their salt. That swelling is the sign of beginner
  • A beriberi
  • B rickets
  • C anaemia
  • D goitre
Show answer
Answer: goitre
Why:

It was widespread across the Himalayan region and the Northern plains.

Q5 Assertion: The food of that region carried very little iodine. Reason: The soil of the region was itself short of iodine. advanced
  • A Both true, and the reason explains the assertion
  • B Both true, but the reason does not explain it
  • C The assertion is true and the reason is false
  • D The assertion is false and the reason is true
Show answer
Answer: Both true, and the reason explains the assertion
Why:

Both are true, and the reason runs from the ground up. Food grown in iodine-poor soil cannot carry what the soil does not have.

Q6 Iodised salt is: beginner
  • A salt with the sand washed out of it
  • B common salt mixed with salts of iodine
  • C salt boiled to make it purer
  • D salt taken from a mine rather than the sea
Show answer
Answer: common salt mixed with salts of iodine
Why:

Adding the missing thing back was the whole idea.

Q7 The Agariya community has farmed salt for generations in one particular landscape of western India. They work in beginner
  • A the Himalayan region
  • B the Nilgiri hills
  • C the Little Rann of Kutch
  • D the Northern plains
Show answer
Answer: the Little Rann of Kutch
Why:

They spend eight months of the year in extreme desert heat.

Q8 Ravi cannot see well once the light fades in the evening. Which vitamin is he most likely short of? beginner
  • A Vitamin B1
  • B Vitamin C
  • C Vitamin D
  • D Vitamin A
Show answer
Answer: Vitamin A
Why:

Poor vision in darkness is the first sign of its lack.

Q9 Consider these statements about deficiency diseases. I. Scurvy follows a shortage of Vitamin C. II. Iodised salt is common salt that has been boiled to make it purer. III. A swelling low at the front of the throat is a sign of goitre. Which statements are correct? advanced
  • A I and II only
  • B II and III only
  • C I and III only
  • D I, II and III
Show answer
Answer: I and III only
Why:

I and III are correct. II is not: iodised salt is common salt MIXED with salts of iodine, which is a different thing from purifying it.

Q10 Which vitamin helps the body absorb calcium? beginner
  • A Vitamin C
  • B Vitamin D
  • C Vitamin A
  • D Vitamin B1
Show answer
Answer: Vitamin D
Why:

That is why its lack shows up as soft and bent bones.

Q11 Soft and bent bones are a symptom of: beginner
  • A goitre
  • B beriberi
  • C rickets
  • D scurvy
Show answer
Answer: rickets
Why:

Sunlight, milk, butter, fish and eggs are the sources to remember.

Q12 Which set gives sources of calcium? beginner
  • A Beetroot, pomegranate, spinach
  • B Seaweed, singhada, iodised salt
  • C Papaya, carrot, mango
  • D Milk, curd, cheese, paneer
Show answer
Answer: Milk, curd, cheese, paneer
Why:

The other three sets belong to Vitamin A, iron and iodine.

Q13 Anaemia, with weakness and shortness of breath, follows a shortage of: beginner
  • A iron
  • B Vitamin A
  • C iodine
  • D calcium
Show answer
Answer: iron
Why:

Iron is an important component of blood.

Q14 Which of these is NOT one of the five major nutrients? beginner
  • A Proteins
  • B Water
  • C Minerals
  • D Carbohydrates
Show answer
Answer: Water
Why:

Water is essential, but the five majors are carbohydrates, proteins, fats, vitamins and minerals.

Q15 Vitamins and minerals are called protective nutrients because they: beginner
  • A are found only in protected crops
  • B are needed in very large amounts
  • C guard the body against diseases
  • D protect food from spoiling
Show answer
Answer: guard the body against diseases
Why:

Small amounts are enough, but they are not optional.

Q16 Meena says vitamins matter little because so little is needed. What is wrong with that? beginner
  • A Vitamins are only needed by growing children
  • B Nothing, since small amounts cannot matter
  • C Vitamins are actually needed in very large amounts
  • D Small amounts are still essential to stay healthy
Show answer
Answer: Small amounts are still essential to stay healthy
Why:

Small is not the same as optional, as scurvy shows.

Q17 Vegetables lose colour and crispness on cooking. What else is lost? beginner
  • A Some nutrients, including Vitamin C
  • B All of their protein and all their fat
  • C Their roughage
  • D Their weight only
Show answer
Answer: Some nutrients, including Vitamin C
Why:

High heat is the reason, which argues for some raw produce in the diet.

Q18 The best way to wash vegetables is: beginner
  • A only if they look dirty
  • B whole, before cutting them
  • C after cutting them into pieces
  • D not at all, to save the vitamins
Show answer
Answer: whole, before cutting them
Why:

Washing cut or peeled produce loses vitamins, but washing must still be done.

Q19 What do the sailors of 1746 and the neck swellings of the 1960s have in common? beginner
  • A Both followed one food component being missing
  • B Both were cured by medicines newly invented
  • C Both were caused by eating spoiled food
  • D Both happened only to people living near the sea
Show answer
Answer: Both followed one food component being missing
Why:

A group of people, a set of symptoms, one component missing.

Q20 Seaweed, water chestnut and iodised salt are all sources of: beginner
  • A calcium
  • B iron
  • C Vitamin D
  • D iodine
Show answer
Answer: iodine
Why:

Water chestnut is singhada, and the mineral supports physical and mental activity.

Important short questions (6)

What did James Lind observe in 1746, and what did it turn out to mean?

That sailors who ate lemons and oranges recovered from gums that bled and swelled. Those symptoms are scurvy, and the fruit was supplying the Vitamin C they lacked.

Why did people of one region develop goitre when their diet seemed ordinary?

Because the soil there held little iodine. The local food and water therefore carried little of it, whatever the people ate.

Name the four vitamins in the chapter with the disease each one's lack causes.

Vitamin A, loss of vision. Vitamin B1, beriberi. Vitamin C, scurvy. Vitamin D, rickets.

Name the three minerals in the chapter and say what each one does.

Calcium keeps bones and teeth healthy. Iodine supports physical and mental activity. Iron is an important component of blood.

Define a nutrient and list the five major nutrients in food.

A nutrient is a food component that gives energy, supports growth, helps repair, protects the body from disease and keeps its functions running. The five are carbohydrates, proteins, fats, vitamins and minerals.

Why should vegetables be washed whole rather than after cutting?

Because washing cut or peeled vegetables loses some vitamins into the water. Washing must still be done thoroughly, so doing it before cutting loses less.

Long answer questions (3)

Think and write: set out the two cases in this topic and explain what they have in common.

In the first, sailors on long voyages had gums that bled and swelled. On a voyage in 1746 the Scottish physician James Lind noticed that those who ate lemons and oranges recovered. The disease is scurvy and the missing thing is Vitamin C. In the second, Indian scientists in the 1960s found swellings low in the throat widespread across the Himalayan region and the Northern plains. That is goitre, and the cause was too little iodine in the soil, and so in the food and water. Both cases follow one shape: a group of people, a set of symptoms, and one component missing from the diet.

Think and write: explain what a nutrient is and why vitamins and minerals are grouped as protective.

A nutrient is a food component that provides energy, supports growth, helps repair, protects the body from disease and maintains its various functions. The major nutrients are carbohydrates, proteins, fats, vitamins and minerals. Of these, carbohydrates and fats supply energy and proteins build and repair. Vitamins and minerals do neither of those things. What they do is guard the body against disease and keep it healthy, so they are called protective nutrients. They are needed in small amounts, but scurvy and goitre show what happens when those small amounts go missing.

Think and write: a cook boils every vegetable for a long time and washes all of them after chopping. Advise her, with reasons.

Two habits are costing her nutrients. Long cooking at high heat destroys some of them, Vitamin C among them, which is also why the vegetables lose their bright colour and go soft. Washing after chopping lets vitamins leave through the cut surfaces into the water. I would suggest washing the vegetables whole and thoroughly before cutting them, cooking them less, and including some fruits and uncooked vegetables in the meal. Washing itself should not be skipped, because everything must be clean before it is eaten.

Flashcards (15)

What did James Lind observe during the voyage of 1746?
That sailors who ate lemons and oranges recovered from gums that bled and swelled.
Which disease shows itself in gums that bleed and swell, and what causes it?
Scurvy, caused by a shortage of Vitamin C.
What did Indian scientists find in the 1960s, and where?
Swellings low in the throat were widespread across the Himalayan region and the Northern plains.
Why was iodine short in the food and water of that region?
Because the soil there was short of iodine, so the crops and water carried little of it.
What is iodised salt?
Ordinary salt with the needed quantity of iodine salts mixed into it.
Who are the Agariyas, and what do they do?
A tribal community who win salt from seawater in the Little Rann of Kutch and elsewhere in Gujarat.
What does Vitamin A do, and what happens without it?
It keeps eyes and skin healthy. Without it comes loss of vision, beginning in darkness.
What does Vitamin B1 do, and which disease follows its lack?
It keeps the heart healthy and supports bodily functions. Its lack causes beriberi.
Name five sources of Vitamin C.
Amla, guava, green chilli, orange and lemon.
What does Vitamin D do, and what is its deficiency disease?
It helps the body absorb calcium for bones and teeth. Its lack causes rickets.
What does calcium do, and what goes wrong without it?
It keeps bones and teeth healthy. Without it come weak bones and tooth decay.
What does iron do, and what is its deficiency disease?
It is an important component of blood. Its lack causes anaemia, with weakness and shortness of breath.
Define a nutrient.
A food component that gives energy, supports growth, helps repair, protects from disease and keeps the body working.
Which two groups are called protective nutrients, and why?
Vitamins and minerals, because they protect the body from diseases and keep us healthy.
What does cooking at high heat do to some nutrients?
It destroys some of them, Vitamin C among them, which is a reason to eat some raw produce.

Play this topic

  • Vitamin or mineral?
  • Missing thing and disease
  • Fact or myth?
  • How a deficiency gets traced
  • Protective sprint

Roughage, Water, and Three Tests

Roughage carries no nutrients yet the body needs it, and so does water. Three simple tests find starch, fat and protein in ordinary food, and one Indian scientist measured over 500 foods to find out what the country was missing.

What you will be able to do

  • I can say what roughage does and name good sources of it.
  • I can explain the two jobs water does in the body.
  • I can describe the tests for starch, fat and protein and the result each gives.
  • I can say who Coluthur Gopalan was and what followed from his surveys.

Key points

  • Dietary fibres, also called roughage, give no nutrients but are an essential part of food.

  • Roughage helps the body get rid of undigested food and lets stools pass smoothly.

  • Plant products supply roughage: wholegrains and pulses, nuts, fresh fruit, and the green leafy vegetables.

  • Water helps the body absorb nutrients from food and removes waste through sweat and urine.

  • Not every nutrient comes from plants or animals: salt comes from seawater or rocks.

  • A blue-black colour after two or three drops of iodine solution shows starch.

  • An oily patch left on paper, faintly letting light through, shows fat.

  • A violet colour after copper sulfate and caustic soda solutions shows protein.

Full explanation

Something That Feeds You Nothing

Here is an odd item. Dietary fibres, also called roughage, provide no nutrients to the body at all. Nothing. And yet they are described as an essential component of our food. A thing that feeds you nothing and is still necessary needs explaining.

What Roughage Actually Does

Its job is clearing up. Roughage helps the body be rid of undigested food, and keeps stools passing smoothly. Anybody with an elderly relative told by a doctor to eat more fibre has already met this advice from the other end.

Where to Find It

It comes mainly from plant products. Wholegrains and pulses supply it, so do nuts, so does fresh fruit, and so do the green leafy vegetables. Notice that the list is almost entirely things people are told to eat more of for other reasons too.

Water Is Part of the Diet

Water counts as an essential part of what we eat, not merely something to drink alongside it. It does two jobs. It helps the body absorb nutrients out of food, and it carries waste away in sweat and in urine. Both matter every day.

Not Everything Comes From a Field

There is a neat question hiding here: do we get all nutrients from plants and animals? No. Salt can come from seawater or from rocks. And Vitamin D can be made by the body itself, simply on being exposed to sunlight.

Eat Local Where You Can

The chapter adds an argument that reaches past the body. Food grown nearby, and coming from plants where that is possible, is healthy for you and also good for the environment and the planet. That is two reasons for one habit.

The Man Who Measured Indian Food

Coluthur Gopalan, who lived from 1918 to 2019, began nutrition research in India. He measured the nutritional value of more than five hundred Indian foods, and set out what a suitable diet looks like in an Indian context, rather than borrowing one.

What His Surveys Found

He led surveys of the nutritional status of the Indian population. They found widespread deficiencies in protein, in energy, and in other food components. That is not an opinion about food. It is a measurement, across a country, and it had consequences.

From a Survey to a School Meal

The work led to the Mid Day Meal Programme. From 2002 it has run as the PM POSHAN initiative. It provides balanced food in government-run and government-aided schools. Millions of children across the country have eaten better because of it.

Can You Test Food Yourself?

Some of this can be checked by hand. Starch, which is a type of carbohydrate, along with fat and protein, can be detected with fairly simple tests. Other components can only be found in a well-equipped laboratory, so three is what we get.

Test One: Iodine for Starch

Take small pieces of several foods, each on its own dish. Potato and cucumber. Bread, and rice and gram both boiled. Peanuts and coconut, both crushed. A little oil and butter. Put two or three drops of diluted iodine solution on each with a dropper. Watch the colour. Blue-black means starch is there.

Test Two: Paper for Fat

Take the same food items again. Put each on its own piece of paper, wrap the paper around it and press, being careful not to tear it. If the item holds a little water, let the paper dry first. Then look for an oily patch.

Holding the Paper to the Light

The patch is the answer, and there is a way to be sure of it. Hold the paper up against the light. Can you see light shining faintly through the patch? That is fat. Oil and butter leave it plainly, and so, less obviously, do peanuts and coconut.

Test Three: Violet for Protein

This one your teacher may demonstrate. Grind each food to a paste or powder with a pestle and mortar. Put about half a teaspoon into a clean test tube. Add two or three teaspoons of water and shake well. Now two drops of copper sulfate solution, and after them ten drops of caustic soda solution. Shake, and leave it undisturbed for a few minutes.

What You See, and What You Must Not Do

A violet colour in the tube means protein. Now the precautions, which are not optional. These chemicals are harmful. Do not touch any of them unless you are told to. If any spills on you, wash the place with water at once. Never put them in your mouth, and never try to smell them.

Peanuts Answer Twice

Fill in the table and one result stands out. Peanuts show the presence of both protein and fat. So a food is not one nutrient wearing a label. Any food we eat may contain several at once, which is exactly what the next topic is built on.

Concepts and terms

Roughage

Also called dietary fibre. It supplies no nutrients at all, yet it is essential, because it helps the body clear undigested food and keeps stools passing smoothly. Plant products supply it.

Water in the diet

Water helps the body absorb nutrients out of food, and it carries waste away through sweat and urine. Both jobs make it an essential part of the diet, not merely a drink.

Food test

A simple check for one component in a food sample. Starch, fat and protein can each be found this way; other components need a well-equipped laboratory.

Nutritional survey

A study of what a population actually eats and what it lacks. Coluthur Gopalan led such surveys in India and found widespread shortages of protein, energy and other components.

Watch out!

Myth or fact?

Case Study

Scenario:

A class tests three foods for starch, fat and protein. Rohit reports that his bread sample shows no starch. The others get a clear result from the same loaf. Their teacher asks the class to compare how each test was done. Rohit used two drops of iodine on a damp piece. The rest dried their samples first and used one drop. The class repeats the test with the drying step added and Rohit's sample now shows starch plainly. Sana writes down what went wrong. The food was not different, the method was, and a test only means something when every sample is treated the same way.

Analysis:

One odd result among three usually points at the method rather than the food. Repeating with the step restored turned the odd result into agreement.

Activity:

Test two foods for starch twice, once damp and once dried. Write down both results and say which step mattered.

Try it at home

Title:

The paper test, done properly

Safety:

Only the fat test, which uses no chemicals. Do not attempt the protein test at home: copper sulfate and caustic soda are harmful and belong in a school laboratory.

What You Notice:

Butter and peanut leave a patch you can see through. Cucumber leaves a damp mark that vanishes as it dries, which is exactly why the chapter tells you to wait. The potato is the interesting one, because it holds starch and almost no fat, so the paper stays clear.

Did you know

Coluthur Gopalan, who lived from 1918 to 2019, measured the nutritional value of over 500 Indian foods.

His surveys led to the Mid Day Meal Programme of 2002, now run as the PM POSHAN initiative.

Peanuts turn up positive in two of the three tests, showing both protein and fat.

Memory tricks

The three tests — Iodine blue-black, paper oily, violet protein — Each test named by what you see. Colour, patch, colour again.

What roughage and water do — Neither feeds you, both are essential — Roughage carries no nutrients and water is not one, yet the body needs both.

Practice MCQs with answers (20)

Q1 The part of our food that passes through the body undigested still has to be eaten every day. Roughage is also known as beginner
  • A dietary fibre
  • B stored energy
  • C a protective nutrient
  • D a mineral
Show answer
Answer: dietary fibre
Why:

Both names are used for the same thing in the chapter.

Q2 A pupil asks why roughage counts as food at all, given that the body cannot digest it. How much nourishment does it give? intermediate
  • A None of it at all
  • B All of the body energy
  • C Most of its protein
  • D A small amount of vitamins
Show answer
Answer: None of it at all
Why:

None. Roughage is not absorbed, and it is still needed: it helps clear undigested food out of the body.

Q3 The job of roughage is to: beginner
  • A supply energy between meals
  • B help clear undigested food from the body
  • C build and repair the muscles
  • D protect the body from a great many diseases
Show answer
Answer: help clear undigested food from the body
Why:

It also keeps stools passing smoothly.

Q4 Four foods are offered and three of them are good sources of roughage. Which one is NOT? beginner
  • A Green leafy vegetables
  • B Wholegrains
  • C Butter
  • D Fresh fruits
Show answer
Answer: Butter
Why:

Roughage comes mainly from suitable plant products.

Q5 Water is part of the diet because it: beginner
  • A supplies energy for activity
  • B builds and repairs the body
  • C helps absorb nutrients and removes waste
  • D protects the body against many infections
Show answer
Answer: helps absorb nutrients and removes waste
Why:

Waste leaves through sweat and urine.

Q6 Which nutrient comes from neither plants nor animals? beginner
  • A Protein
  • B Fat
  • C Carbohydrate
  • D Salt
Show answer
Answer: Salt
Why:

It is won either from seawater or out of rocks.

Q7 One vitamin the body can make for itself, given sunlight, rather than having to take it from food. That vitamin is beginner
  • A Vitamin A
  • B Vitamin B1
  • C Vitamin C
  • D Vitamin D
Show answer
Answer: Vitamin D
Why:

It does so on being exposed to sunlight.

Q8 Coluthur Gopalan analysed Indian foods for their nutrient content over the course of his career. How many foods did that cover? beginner
  • A More than five hundred
  • B About fifty
  • C About five thousand
  • D Exactly one hundred
Show answer
Answer: More than five hundred
Why:

He lived from 1918 to 2019.

Q9 What did the nutritional surveys led by Gopalan find? beginner
  • A That Indians ate more than they needed
  • B That widespread deficiencies existed in protein and energy
  • C That only children were affected
  • D That the Indian diet needed no sort of change at all anywhere
Show answer
Answer: That widespread deficiencies existed in protein and energy
Why:

A measurement across a population, not an opinion.

Q10 A programme was begun to serve every school child a cooked meal each day across India. The Mid Day Meal Programme started in beginner
  • A 1960
  • B 1984
  • C 2002
  • D 2015
Show answer
Answer: 2002
Why:

It runs now as the PM POSHAN initiative.

Q11 Which three components can be tested for with fairly simple equipment? beginner
  • A Vitamin A, calcium and iron
  • B Starch, fat and protein
  • C Water, roughage and salt
  • D Vitamin C, iodine and fat
Show answer
Answer: Starch, fat and protein
Why:

The others need a well-equipped laboratory.

Q12 Farida is setting up the starch test on a slice of potato and reaches for the dropper. How much diluted iodine solution goes on? beginner
  • A One
  • B Two or three
  • C Ten
  • D Half a teaspoon
Show answer
Answer: Two or three
Why:

Then watch for a change in the colour of the food.

Q13 Farida puts iodine solution on a slice of potato and it turns blue-black. This shows: beginner
  • A fat is present
  • B protein is present
  • C starch is present
  • D nothing is present
Show answer
Answer: starch is present
Why:

Starch is a type of carbohydrate.

Q14 Consider these statements about roughage. I. Roughage is also known as dietary fibre. II. Roughage gives the body no nourishment at all. III. Green leafy vegetables and wholegrains are good sources of it. Which statements are correct? advanced
  • A I and II only
  • B II and III only
  • C I and III only
  • D I, II and III
Show answer
Answer: I, II and III
Why:

All three are correct. Roughage feeds nothing and is still needed, because it helps clear undigested food out of the body.

Q15 Assertion: A damp food item is left to dry before the paper test for fat. Reason: Water left on the paper would be mistaken for fat. advanced
  • A Both true, and the reason explains the assertion
  • B Both true, but the reason does not explain it
  • C The assertion is true and the reason is false
  • D The assertion is false and the reason is true
Show answer
Answer: Both true, and the reason explains the assertion
Why:

Both are true, and the reason is the trap the step avoids. A wet patch and a greasy patch look much the same.

Q16 Which pair is used in the protein test? beginner
  • A Iodine solution and water
  • B Copper sulfate and caustic soda solutions
  • C Vinegar and lemon juice
  • D A salt solution and a sugar solution together
Show answer
Answer: Copper sulfate and caustic soda solutions
Why:

Two drops of the first, then ten drops of the second.

Q17 A violet colour in the test tube shows the presence of: beginner
  • A starch
  • B fat
  • C protein
  • D roughage
Show answer
Answer: protein
Why:

Leave the tube undisturbed for a few minutes first.

Q18 If a chemical spills on your skin during the test, you should: beginner
  • A wash the area with water at once
  • B wipe it on your clothes
  • C leave it and see whether it stings
  • D smell it to identify what it was
Show answer
Answer: wash the area with water at once
Why:

These chemicals are harmful and must be handled with care.

Q19 Peanuts are crushed and put through all three food tests, and two of the three come out positive. Which two? beginner
  • A Starch and fat
  • B Starch and protein
  • C Protein and roughage
  • D Fat and protein
Show answer
Answer: Fat and protein
Why:

One food may contain several nutrients at once.

Q20 Peanuts test positive for both fat and protein in the same experiment. What does that tell you about food in general? intermediate
  • A Peanuts are the healthiest food that a person can eat
  • B Most foods carry no nutrients worth the name at all
  • C The three food tests cannot be relied upon together
  • D A single food may carry more than one nutrient at once
Show answer
Answer: A single food may carry more than one nutrient at once
Why:

A food is not one nutrient. The tests are read together, which is why a single item can come out positive in two of them.

Important short questions (6)

Roughage gives no nutrients. Why is it still called essential?

Because it helps the body get rid of undigested food and keeps stools passing smoothly. That work is necessary even though no nourishment comes from it.

State the two jobs water does, and name one way waste leaves the body.

Water helps the body absorb nutrients out of food, and it carries waste away. That waste leaves in sweat, and also in urine.

Describe the test for starch and the result that shows it is present.

Put a small piece of the food on a dish and add two or three drops of diluted iodine solution with a dropper. A blue-black colour shows that starch is present.

How would you test a piece of coconut for fat, and how would you confirm the result?

Wrap it in paper and press without tearing, letting the paper dry if it is damp. An oily patch shows fat, and holding the paper to the light shows light shining faintly through it.

List three precautions for the protein test.

Do not touch the chemicals unless told to. Wash any spill off your skin at once with water. Never put them in your mouth or try to smell them.

What did the surveys led by Coluthur Gopalan find, and what followed from them?

They found shortages of protein, of energy and of other components, right across the Indian population. That led to the Mid Day Meal Programme, running since 2002 as PM POSHAN.

Long answer questions (3)

Think and write: two things in this topic are essential to the body but supply no nourishment. Name them and explain each.

The first is roughage, also called dietary fibre. It provides no nutrients at all, yet the body needs it to clear undigested food and to keep stools passing smoothly. Wholegrains, pulses, nuts, fresh fruit and the green leafy vegetables supply it. The second is water. It nourishes nothing by itself, but it helps the body absorb nutrients out of food, and it carries waste away in sweat and urine. Both show that being essential and being nourishing are two different things.

Think and write: describe how you would test one food for all three components, in order.

I would cut three small pieces. For starch I would put one on a dish and add two or three drops of diluted iodine solution. A blue-black colour means starch. For fat I would wrap the second piece in paper and press it without tearing. If the food were damp I would let the paper dry first. Then I would hold it to the light and look for a patch that lets light through. For protein I would grind the third piece with a pestle and mortar. Half a teaspoon goes into a test tube with water. Then two drops of copper sulfate and ten of caustic soda. Violet means protein.

Think and write: explain how measuring what a country eats ended up changing what children are given at school.

Coluthur Gopalan began nutrition research in India. He measured the nutritional value of more than five hundred Indian foods. He set out a diet suited to an Indian context, rather than one borrowed from elsewhere. Next he led surveys of how well the population was actually fed. Those surveys found shortages of protein, of energy and of other components. Because that was measured rather than argued, it could be acted on. It led to the Mid Day Meal Programme, running since 2002 as PM POSHAN. That scheme provides balanced food in government-run and government-aided schools.

Flashcards (15)

What is another name for dietary fibre?
Roughage.
How many nutrients does roughage supply?
None at all, and it is still an essential component of food.
What does roughage do for the body?
It helps the body get rid of undigested food and keeps stools passing smoothly.
Name five good sources of roughage.
Wholegrains, pulses, nuts, fresh fruit and the green leafy vegetables.
Give the two jobs water does in the body.
It helps the body absorb nutrients out of food, and it carries waste away in sweat and urine.
Name a nutrient that comes from neither plants nor animals.
Salt, which is won either from seawater or out of rocks.
Which three components can be tested for with simple equipment?
Starch, fat and protein. Others need a well-equipped laboratory.
What is used to test for starch, and what result shows it is present?
Two or three drops of diluted iodine solution. A blue-black colour shows starch.
How is the test for fat carried out?
Wrap the food in paper and press it without tearing. An oily patch shows fat.
How can you check an oily patch is really there?
Hold the paper against the light and look for light shining faintly through the patch.
Which two solutions are added in the protein test, and in what amounts?
Two drops of copper sulfate solution, then ten drops of caustic soda solution.
What colour shows the presence of protein?
Violet.
Give two precautions for the protein test.
Do not touch the chemicals unless asked, and never put them in your mouth or smell them.
Which food in the chapter tests positive for both fat and protein?
Peanuts.
Who was Coluthur Gopalan and what came of his work?
He began nutrition research in India, and his surveys led to the Mid Day Meal Programme of 2002.

Play this topic

  • Which test finds it?
  • Step and result
  • Fact or myth?
  • The protein test, in order
  • Test bench sprint

A Balanced Diet, and How Far Food Travels

A balanced diet carries every nutrient, plus roughage and water, each in the amount needed for person eating it. Junk food fails that test, millets pass it easily, and food miles ask a different question about the same plate.

What you will be able to do

  • I can define a balanced diet and say what makes one person's differ from another's.
  • I can read a nutrition label and compare two foods from it.
  • I can explain what makes a food junk food and why frequent eating of it is harmful.
  • I can say what millets are, why they are called nutri-cereals, and what food miles means.

Key points

  • A balanced diet carries every nutrient the body needs, with roughage and water, in amounts that suit the eater.

  • Requirements vary with age, gender, physical activity, health status and lifestyle.

  • Junk foods are high in calories from sugar and fat and very low in protein, minerals, vitamins and fibre.

  • Potato wafers, candy bars and carbonated drinks are the examples the chapter gives.

  • Eating junk food often can make a person obese and bring several health problems.

  • Jowar, bajra, ragi and sanwa are millets, native crops of India, also called nutri-cereals.

  • Millets carry vitamins, minerals such as iron and calcium, and dietary fibres.

  • Food miles counts how far a food has travelled in all, from producer to eater.

Full explanation

Does Everyone Need the Same Food?

Ask whether you and your grandparents need the same nutrients, in the same amounts, and the answer is plainly no. Requirements vary with age, with gender, with how much physical activity a person does, with health, and with the way somebody lives.

The Definition to Hold On To

The definition runs like this. A diet counts as balanced when it carries every essential nutrient, plus roughage and water, in amounts right for the body to grow and develop. Read that again and notice the words in the right amount. That is the part doing the real work.

Check Your Own Week

Go back to the list of everything you ate over a week. Does it carry all the nutrients and the other essential components? If not, which are missing? That is a question you can answer yourself, and it is more useful than any general advice about eating well.

Two Packets, Side by Side

Here is a real comparison. Take a packet of potato wafers, and beside it a packet of roasted chana. Both carry nutritional information for 100 grams. Read both before choosing, and the choice starts to look different.

What the Numbers Say

Take 100 grams of each. The wafers give 536 kilocalories. Their fat is 35.0 g, carbohydrate 53.0 g, protein 7.0 g, dietary fibre 4.8 g. The roasted chana gives 355 kilocalories. Its fat is 6.26 g, carbohydrate 58.58 g, protein 18.64 g, fibre 16.8 g.

Reading Those Two Columns

The chana has more than twice the protein and more than three times the fibre, on far less fat and fewer calories. The wafers win on nothing except energy density, and energy is the one thing most of us are not short of.

The Name for the Losing Column

Some foods carry a great many calories, because sugar and fat run high in them, while protein, minerals, vitamins and dietary fibre all run very low. Those are called junk foods. Potato wafers, candy bars and carbonated drinks are the examples in the chapter.

Why Frequent Is the Problem

Nobody says one packet ruins a person. What the chapter says is that eating such foods frequently is not good for the body. It can make a person obese, and someone who becomes obese may suffer from several health problems.

Health Is the Ultimate Wealth

Dr Poshita, the nutritional expert at the food festival, keeps repeating a line: health is the ultimate wealth. Keeping to a balanced diet, and staying off junk food, are the two habits that build towards a healthy body, and good health is what a happy life rests on.

Four Grains Coming Back

You have probably heard of jowar, bajra, ragi and sanwa, which is the barnyard millet. These are native crops of India and they can be cultivated easily in many different climates. Together they are called millets.

Why Millets Are Called Nutri-cereals

Millets are small grains that India has eaten for centuries. They are popular again now, for what they do for health. They carry vitamins in quantity, along with minerals such as iron and calcium, and of dietary fibres, which is why they carry the second name nutri-cereals.

What a Packet Must Tell You

Packaged food must carry information about its nutrients on the cover, listing the amount of each one. Sometimes a maker puts extra nutrients into a food while processing it, to raise its nutritional quality. That is called fortification, and iodised salt is one result of it. Certain baby foods are another.

Who Checks the Packets

India's Food Safety and Standard Authority, known as FSSAI, is the government body charged with regulating food quality here. So the label on a packet is not merely a claim by whoever sold it to you.

The Story of a Chapati

How does food get from a farm to a plate? A farmer grows the wheat. The grain is threshed and winnowed, then stored. It is ground and packed, then transported to a retail shop. Only then does it reach the plate. Count the people involved and the time taken.

Food Miles

Add up the whole journey a bag of wheat makes, or any other food, from the person who produced it to the person who eats it. That total is called its food miles. Shortening it cuts the cost and the pollution of transport, supports local farmers, and keeps food fresher.

And Do Not Waste It

Many people leave food unconsumed on their plates. Think of the time and effort that farmers and others put into moving it from the farm to that plate. Take only as much as you can eat. Eat healthy, share, and respect food.

Concepts and terms

Balanced diet

A diet carrying every essential nutrient, plus roughage and water, in amounts right for the body to grow and develop properly. That amount is not the same for everybody.

Junk food

Food that is high in calories because of high sugar and fat, while carrying very little protein, minerals, vitamins or dietary fibre. Eating it often is not good for the body.

Millets

Small-sized grains native to India, such as jowar, bajra, ragi and sanwa. They grow in many climates and carry vitamins, minerals and fibre, which is why they are called nutri-cereals.

Food miles

How far a food has travelled in total, counted from the producer all the way to the person eating it. Keeping it short cuts cost and pollution and helps local farmers.

Case study: what the school canteen should stock

Scenario:

The canteen at a school in Dharwad has money for one new snack. Two are offered at the same price. The first is potato wafers. Per 100 grams the packet declares 536 kilocalories, 35.0 g of fat, 53.0 g of carbohydrate, 7.0 g of protein and 4.8 g of dietary fibre. The second is roasted chana. Its packet declares 355 kilocalories, 6.26 g of fat, 58.58 g of carbohydrate, 18.64 g of protein and 16.8 g of fibre. The wafers are made four hundred kilometres away. The chana is roasted by a family in the next town. Several students say the wafers will sell better. The Class 6 group has been asked to advise the canteen committee before it decides.

Analysis:

Two separate questions are tangled together here. One is what the food does to the body, which the labels answer. The other is how far it travelled, which they do not. Both point the same way this time, but they are not the same question.

Activity:

Collect five empty food packets from home, with permission. Copy the per-100-gram figures for energy, fat, protein and fibre into a table. Rank the five by protein and then by fat, and see whether the two rankings agree. Then find out, from the packet or from an adult, roughly where each one was made.

Watch out!

Myth or fact?

Try it at home

Title:

Three packets, one table

Safety:

Use empty packets only. Do not open any sealed packet to read its label, and wash your hands after handling used packaging.

What You Notice:

The columns rarely agree. A packet that wins on energy usually loses on fibre, which is the whole point of reading more than one number. The manufacturing address is the part almost nobody looks at, and it is often much further away than people guess.

Did you know

Per 100 g, potato wafers carry 536 kilocalories and roasted chana 355, so the wafers are far denser in energy.

Per 100 g, roasted chana has 18.64 g of protein against 7.0 g in potato wafers, and 16.8 g of fibre against 4.8 g.

Sanwa is the barnyard millet, and jowar, bajra and ragi are the other three the chapter names.

Memory tricks

What makes a diet balanced — All nutrients, roughage, water, right amount — Four parts. The last one is the part people forget, and it differs per person.

The four millets — Jowar, bajra, ragi, sanwa — All four are native crops of India, and all four are nutri-cereals.

Practice MCQs with answers (20)

Q1 A balanced diet must contain: beginner
  • A every nutrient, plus roughage and water, each in the amount needed
  • B as much protein as the human body can possibly take in at any one time
  • C only foods grown within one district
  • D no fat and no carbohydrate at all
Show answer
Answer: every nutrient, plus roughage and water, each in the amount needed
Why:

The phrase in the right amount is the working part of the definition.

Q2 Consider these statements about eating well. I. A balanced diet must carry every nutrient, plus roughage and water. II. Fortification means washing the extra nutrients out of a food. III. Jowar, bajra, ragi and sanwa are all millets. Which statements are correct? advanced
  • A I and II only
  • B II and III only
  • C I and III only
  • D I, II and III
Show answer
Answer: I and III only
Why:

I and III are correct. II is the opposite: fortification ADDS nutrients to a food while it is being processed.

Q3 Per 100 g, potato wafers give 536 kcal and roasted chana 355 kcal. This means the wafers: beginner
  • A contain more protein
  • B are denser in energy
  • C contain more fibre
  • D are the better choice
Show answer
Answer: are denser in energy
Why:

Energy density is the only measure on which the wafers lead.

Q4 Per 100 g the roasted chana has 18.64 g of protein against 7.0 g in the wafers. Roughly how many times more? beginner
  • A About one half as much again
  • B About the same
  • C About two and a half times
  • D About ten times
Show answer
Answer: About two and a half times
Why:

Reading a label is a matter of comparing the columns, not the pictures.

Q5 Which food carries 16.8 g of dietary fibre per 100 g? beginner
  • A Potato wafers
  • B A carbonated drink
  • C A candy bar
  • D Roasted chana
Show answer
Answer: Roasted chana
Why:

The wafers carry 4.8 g, which is less than a third of it.

Q6 Junk foods are high in calories because they are high in: beginner
  • A protein and fibre
  • B vitamins and minerals
  • C sugar and fat
  • D water and roughage
Show answer
Answer: sugar and fat
Why:

And they are very low in protein, minerals, vitamins and fibre.

Q7 Which set names three junk foods from the chapter? beginner
  • A Ragi, bajra, jowar
  • B Potato wafers, candy bars, carbonated drinks
  • C Roasted chana, amla, guava and fresh groundnuts
  • D Milk, paneer, curd
Show answer
Answer: Potato wafers, candy bars, carbonated drinks
Why:

One of them is the packet compared against roasted chana.

Q8 Assertion: Eating junk food often can make a person obese. Reason: Junk foods are high in sugar and in fat. advanced
  • A Both true, and the reason explains the assertion
  • B Both true, but the reason does not explain it
  • C The assertion is true and the reason is false
  • D The assertion is false and the reason is true
Show answer
Answer: Both true, and the reason explains the assertion
Why:

Both are true, and the reason is why. They carry a great many calories and very little of anything else.

Q9 Jowar, bajra, ragi and sanwa are all: beginner
  • A pulses
  • B fruits
  • C minerals
  • D millets
Show answer
Answer: millets
Why:

Sanwa is the barnyard millet.

Q10 Millets are called nutri-cereals because they contain: beginner
  • A a great deal more sugar than other grains
  • B more water than other grains
  • C vitamins, minerals and dietary fibres
  • D no carbohydrate at all
Show answer
Answer: vitamins, minerals and dietary fibres
Why:

Iron and calcium are the minerals the chapter names.

Q11 Which statement about millets is correct? beginner
  • A They are imported into India from abroad
  • B They can only be grown in one kind of climate
  • C They are native crops that grow in many climates
  • D They have only been eaten in India since 2002
Show answer
Answer: They are native crops that grow in many climates
Why:

They have been part of the Indian diet for centuries.

Q12 Putting extra nutrients into a food while it is being processed is called: beginner
  • A fortification
  • B winnowing
  • C threshing
  • D balancing
Show answer
Answer: fortification
Why:

Iodised salt is one example of it, and certain baby foods another.

Q13 FSSAI is: beginner
  • A a brand of packaged food
  • B a millet grown in south India
  • C a nutrient that gets added in during processing
  • D a government agency regulating food quality
Show answer
Answer: a government agency regulating food quality
Why:

The letters stand for India's Food Safety and Standard Authority, the national regulator.

Q14 Food miles means: beginner
  • A how far a person walks to buy food
  • B how far a food has travelled from producer to eater
  • C the energy that a food gives for every 100 grams of it
  • D the number of shops a food is sold in
Show answer
Answer: how far a food has travelled from producer to eater
Why:

A bag of wheat is the example the chapter uses.

Q15 Which is NOT a reason given for reducing food miles? beginner
  • A It cuts the cost of transport
  • B It cuts pollution from transport
  • C It supports local farmers
  • D It makes food cheaper to grow
Show answer
Answer: It makes food cheaper to grow
Why:

Keeping food fresh and healthy is the fourth reason given.

Q16 Put these in the right order: storage, threshing and winnowing, grinding and packing. beginner
  • A Grinding, storage, threshing
  • B Threshing, storage, grinding
  • C Storage, grinding, threshing
  • D Threshing, grinding, storage
Show answer
Answer: Threshing, storage, grinding
Why:

The grain is cleaned, then kept, then turned into flour.

Q17 Nikhil buys a packet and sees no nutrient information anywhere on it. What should that tell him? beginner
  • A That the food inside must be very fresh
  • B That the packet fails a requirement it should meet
  • C That the food inside contains no nutrients of any kind
  • D That the food has been fortified
Show answer
Answer: That the packet fails a requirement it should meet
Why:

Packaged food must carry the amount of each nutrient on its cover.

Q18 Why does the chapter ask you to take only as much food as you can eat? beginner
  • A Because waste throws away everyone's work in getting it there
  • B Because leftover food cannot be stored
  • C Because large plates are a great deal more expensive than small ones
  • D Because eating slowly is healthier
Show answer
Answer: Because waste throws away everyone's work in getting it there
Why:

A farmer and many others moved that food from the farm to the plate.

Q19 A shopkeeper stocks apples from two thousand kilometres away and apples grown nearby. The local ones have: beginner
  • A fewer food miles
  • B more food miles
  • C more calories per 100 g
  • D less dietary fibre
Show answer
Answer: fewer food miles
Why:

Shorter travel means less cost, less pollution and fresher fruit.

Q20 Two children of different ages eat exactly the same amounts of everything. What is wrong? beginner
  • A Nothing, since a balanced diet is the same for everyone
  • B Only the older child needs a balanced diet
  • C Children should never eat the same foods
  • D Requirements vary with age, so the right amount differs
Show answer
Answer: Requirements vary with age, so the right amount differs
Why:

Age, gender, activity, health and lifestyle all move the figure.

Important short questions (6)

Define a balanced diet and say why it is not the same for everybody.

A balanced diet carries every essential nutrient, with roughage and water, in amounts suited to the eater. That amount varies with age, gender, activity, health and lifestyle.

Using the label figures, give two reasons for choosing roasted chana over potato wafers.

The chana has 18.64 g of protein per 100 g against 7.0 g, and 16.8 g of fibre against 4.8 g. It also carries far less fat and fewer calories.

What makes a food a junk food, and what can eating it often lead to?

High calories from sugar and fat, with very low protein, minerals, vitamins and dietary fibre. Eating such food frequently can make a person obese and bring several health problems.

Name the four millets and say why they are called nutri-cereals.

Jowar, bajra, ragi and sanwa. They are called nutri-cereals because they are good sources of vitamins, of minerals such as iron and calcium, and of dietary fibres.

What is fortification, and give two examples of fortified food.

Fortification means putting extra nutrients into a food while it is processed, so that its nutritional quality rises. Iodised salt is one example and certain baby foods another.

What are food miles, and give two reasons for keeping them short?

Food miles is how far a food has travelled in all, producer to eater. Keeping it short cuts transport cost and pollution, and it supports local farmers.

Long answer questions (3)

Think and write: a shop offers a packet of wafers and a packet of roasted chana at the same price. Argue for one of them using the labels.

I would take the roasted chana, and the figures on the two packets are the reason. Per 100 grams the chana carries 18.64 g of protein against 7.0 g in the wafers. Its dietary fibre is 16.8 g against 4.8 g. Its fat is 6.26 g against 35.0 g, and its energy 355 kilocalories against 536. So the chana gives far more of what the body is usually short of and far less of what it is not. The wafers lead on energy density alone, and that is what makes them a junk food.

Think and write: explain what food miles are, and what a school could do about them.

Food miles is the whole journey a bag of wheat makes, or any other food, from the person who produced it to the person who eats it. Shortening that journey cuts the cost of transport and the pollution it causes. It supports local farmers, and it keeps the food fresher and healthier. A school could buy its vegetables and grain from farms nearby rather than from far away. It could serve what is in season locally. It could also ask where each item on the plate has come from, which is the step most people never take.

Think and write: trace a chapati from the farm to your plate, and say why food should not be wasted.

A farmer grows the wheat. The grain is threshed and winnowed to clean it, and then stored. Later it is ground into flour and packed. The packed flour is transported to a retail shop. Someone buys it, and it is cooked into a chapati that reaches the plate. Every one of those steps takes time and people. That is why leaving food unconsumed on a plate is a real loss: it throws away the work of the farmer and of everybody after them. Taking only as much as you can eat is the simplest answer.

Flashcards (15)

What is a balanced diet?
One carrying every essential nutrient, plus roughage and water, in amounts that suit the person.
Name five things that change how much of each nutrient a person needs.
Age, gender, physical activity, health status and lifestyle.
What makes a food a junk food?
High calories from sugar and fat, with very low protein, minerals, vitamins and fibre.
Which three junk foods does the chapter name?
Potato wafers, candy bars and carbonated drinks.
What can eating junk food frequently lead to?
It can make a person obese, and an obese person may suffer several health problems.
Per 100 g, how much protein is in potato wafers and in roasted chana?
7.0 g in the wafers and 18.64 g in the roasted chana.
Per 100 g, how much energy do potato wafers and roasted chana give?
536 kilocalories from the wafers and 355 from the roasted chana.
Per 100 g, how much dietary fibre is in each of those two foods?
4.8 g in the potato wafers and 16.8 g in the roasted chana.
Name the four millets given in the chapter.
Jowar, bajra, ragi and sanwa, which is the barnyard millet.
Why are millets also called nutri-cereals?
Because they carry vitamins, minerals such as iron and calcium, and dietary fibres.
What must packaged food carry on its cover?
Information about its nutrients, listing the amount of each one.
What is fortification, with an example?
Putting extra nutrients into a food while it is processed, to raise its quality. Iodised salt is one.
What does FSSAI stand for and what does it do?
It stands for India's Food Safety and Standard Authority, the government body that regulates food quality.
What are food miles?
How far a food has travelled in total, from producer to the person eating it.
Give three reasons for reducing food miles.
It cuts cost and pollution in transport, supports local farmers, and keeps food fresh and healthy.

Play this topic

  • Junk food or nutri-cereal?
  • Term and meaning
  • Fact or myth?
  • The story of a chapati
  • Label-reading sprint

Class 6 Science Chapter 3 — frequently asked questions

Why is the traditional food of a state usually based on its own crops?

Because those crops are what grow there and are easily available. A region can only build its everyday dishes from what its soil and climate allow it to raise.

Name the four things that shape the choice of food in a region.

The crops cultivated in that region come first. Then the taste preferences of the people there, the culture, and the traditions.

Match one state to its crops and one of its dishes, for any two states.

Punjab grows maize and eats makki di roti. Karnataka grows ragi and eats ragi mudde. Either pair is enough.

Why is glucose given to a marathon runner rather than a plate of food?

Because glucose provides energy at once. A meal would take time the runner does not have during a race.

Name three sources of carbohydrate from three different kinds of food.

Wheat from the cereals, potato from the vegetables, and banana from the fruits. Common sugar would also count.

What is the difference in role between a carbohydrate and a fat?

Carbohydrate supplies energy that can be used at once. Fat is a store of energy, kept for later use.

What did James Lind observe in 1746, and what did it turn out to mean?

That sailors who ate lemons and oranges recovered from gums that bled and swelled. Those symptoms are scurvy, and the fruit was supplying the Vitamin C they lacked.

Why did people of one region develop goitre when their diet seemed ordinary?

Because the soil there held little iodine. The local food and water therefore carried little of it, whatever the people ate.

Name the four vitamins in the chapter with the disease each one's lack causes.

Vitamin A, loss of vision. Vitamin B1, beriberi. Vitamin C, scurvy. Vitamin D, rickets.

Roughage gives no nutrients. Why is it still called essential?

Because it helps the body get rid of undigested food and keeps stools passing smoothly. That work is necessary even though no nourishment comes from it.

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